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IAU Minor Planet Center

Minor Planet Center

Natural Satellites Ephemeris Service

Ephemerides, orbital elements and residual blocks for the outer irregular satellites of the giant planets are available here.

Choose which objects you wish to observe, select what information you want returned, indicate your ephemeris options (if necessary) and then select the "Get Information" button. 

Selection of Objects


 All Jovian outer irregular satellites

 All unnumbered Jovian outer irregular satellites

 All numbered Jovian outer irregular satellites

 Just the following Jovian outer irregular satellites

   S/2003 J 23                    Jupiter XLIV (Kallichore)      Jupiter XXV (Erinome)

   S/2003 J 19                    Jupiter XLIII (Arche)          Jupiter XXIV (Iocaste)

   S/2003 J 18                    Jupiter XLII (Thelxinoe)       Jupiter XXIII (Kalyke)

   S/2003 J 16                    Jupiter XLI (Aoede)            Jupiter XXII (Harpalyke)

   S/2003 J 15                    Jupiter XL (Mneme)             Jupiter XXI (Chaldene)

   S/2003 J 12                    Jupiter XXXIX (Hegemone)       Jupiter XX (Taygete)

   S/2003 J 10                    Jupiter XXXVIII (Pasithee)     Jupiter XIX (Megaclite)

   S/2003 J 9                     Jupiter XXXVII (Kale)          Jupiter XVIII (Themisto)

   S/2003 J 5                     Jupiter XXXVI (Sponde)         Jupiter XVII (Callirrhoe)

   S/2003 J 4                     Jupiter XXXV (Orthosie)        Jupiter XIII (Leda)

   S/2003 J 3                     Jupiter XXXIV (Euporie)        Jupiter XII (Ananke)

   S/2003 J 2                     Jupiter XXXIII (Euanthe)       Jupiter XI (Carme)

   S/2000 J 11                    Jupiter XXXII (Eurydome)       Jupiter X (Lysithea)

   Jupiter L (Herse)              Jupiter XXXI (Aitne)           Jupiter IX (Sinope)

   Jupiter XLIX (Kore)            Jupiter XXX (Hermippe)         Jupiter VIII (Pasiphae)

   Jupiter XLVIII (Cyllene)       Jupiter XXIX (Thyone)          Jupiter VII (Elara)

   Jupiter XLVII (Eukelade)       Jupiter XXVIII (Autonoe)       Jupiter VI (Himalia)

   Jupiter XLVI (Carpo)           Jupiter XXVII (Praxidike)

   Jupiter XLV (Helike)           Jupiter XXVI (Isonoe)

 All Saturnian outer irregular satellites

 All unnumbered Saturnian outer irregular satellites

 All numbered Saturnian outer irregular satellites

 Just the following Saturnian outer irregular satellites

   S/2007 S 3                     Saturn XLVI (Loge)             Saturn XXIX (Siarnaq)

   S/2007 S 2                     Saturn XLV (Kari)              Saturn XXVIII (Erriapus)

   S/2006 S 3                     Saturn XLIV (Hyrrokkin)        Saturn XXVII (Skathi)

   S/2006 S 1                     Saturn XLIII (Hati)            Saturn XXVI (Albiorix)

   S/2004 S 17                    Saturn XLII (Fornjot)          Saturn XXV (Mundilfari)

   S/2004 S 13                    Saturn XLI (Fenrir)            Saturn XXIV (Kiviuq)

   S/2004 S 12                    Saturn XL (Farbauti)           Saturn XXIII (Suttungr)

   S/2004 S 7                     Saturn XXXIX (Bestla)          Saturn XXII (Ijiraq)

   Saturn LII (Tarqeq)            Saturn XXXVIII (Bergelmir)     Saturn XXI (Tarvos)

   Saturn LI (Greip)              Saturn XXXVII (Bebhionn)       Saturn XX (Paaliaq)

   Saturn L (Jarnsaxa)            Saturn XXXVI (Aegir)           Saturn XIX (Ymir)

   Saturn XLVIII (Surtur)         Saturn XXXI (Narvi)            Saturn IX (Phoebe)

   Saturn XLVII (Skoll)           Saturn XXX (Thrymr)

 All Uranian outer irregular satellites

 All unnumbered Uranian outer irregular satellites

 All numbered Uranian outer irregular satellites

 Just the following Uranian outer irregular satellites

   Uranus XXIV (Ferdinand)        Uranus XXI (Trinculo)          Uranus XVIII (Prospero)

   Uranus XXIII (Margaret)        Uranus XX (Stephano)           Uranus XVII (Sycorax)

   Uranus XXII (Francisco)        Uranus XIX (Setebos)           Uranus XVI (Caliban)

 All Neptunian outer irregular satellites

 All unnumbered Neptunian outer irregular satellites

 All numbered Neptunian outer irregular satellites

 Just the following Neptunian outer irregular satellites

   Neptune XIII (Neso)            Neptune XI (Sao)               Neptune IX (Halimede)

   Neptune XII (Laomedeia)        Neptune X (Psamathe)           Neptune II (Nereid)

Output Format(s) Required

I require Ephemerides

I require Orbital Elements
either Multi-line format or One-line format
Please Show residual blocks

Ephemeris Options

The desired start date for the ephemerides should be entered in YYYY MM DD format (e.g., 2004 July 2 = 2004 07 02). The default is the most recent 0h UT hour.

Start date: Number of dates to output

Ephemeris interval: Ephemeris units: days hours minutes seconds

Observatory code:

Display positions in: truncated sexagesimal or full sexagesimal or decimal units

Total motion and direction
Separate R.A. and Decl. coordinate motions
Separate R.A. and Decl. sky motions
Display motions as: "/sec "/min "/hr °/day

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